yahoo mail attachments and youtube videos

hi--i tried all of sly fox's suggestions but i still get the same results. i'm unable to view videos on youtube or open attachments in yahoo mail. when i try to perform either action, the privacy advisor tells me that private headers, cookies, etc. at those sites are being blocked. i reconfigured zonealarm to allow those things and i still get the zone alarm message that these items are being blocked. any further hep would be greatly appreciated. thanks!